P2v+ got lost and spent three months in an agriculture field. Camera, gimbal, and escs seemed to work correctly when it was found. Replaced shell, bent gimbal arm, and gimbal ribbon cable (damaged during arm replacement). Now the rear gimbal light flashes red after startup and the gimbal doesn't perform normal startup. Front gimbal led fell off upon removing cover over main gimbal board. What are potential causes of error? Is front led needed for proper gimbal operation? Tried soldering an led from a donor board, but still not functioning.